

Nothing people do has zero impact. But pretty much everything else has a bigger one. Coal will utterly destroy the land, and the gases emitted after it burns will destroy far more.
Solar like this on a few percent of the land will supply all the electricity people need. So it looks huge, but is surprisingly low-impact compared with other options, or things like raising cattle
You’re assuming that the world is covered in server racks. I don’t expect anything like that, even with significant increases in datacenter construction.
Let’s assume 1kw per person. 10 billion people at peak population some time hence. So about 150 billion m2 to provide 1kw per person 24/7. The earth’s surface area is 510.1 trillion m², of which about 1/3 is land. So we’re probably just fine on renewables.